Detail publikace

Spectral Characterization of Selected Natural Humic Substances

ENEV, V. POSPÍŠILOVÁ, Ľ. KLUČÁKOVÁ, M. LIPTAJ, T. DOSKOČIL, L.

Originální název

Typ

článek v časopise ve Web of Science, Jimp

Jazyk

angličtina

Originální abstrakt

Current concern for soil quality has stimulated research on soil organic matter (OM). Humic substances (HS) of different origin were compared applying UV/VIS spectroscopy, Fourier transform infrared spectroscopy (FTIR), fluorescence spectroscopy, and 13C nuclear magnetic resonance (13C NMR). Sodium humates samples were isolated from soil (Gleyic Luvisol), compost, and South Moravian lignite from the mine Mír in Mikulčice. Sodium humates (SH) were extracted by a conventional procedure recommended by the International Humic Substances Society (IHSS). Results showed that the presence of O containing functional groups (carbonyl in aldehydes and ketones, carboxyl in carboxylic acids, ester and ether groups) are in the order of compost > soil > lignohumate > lignite. Further, results of FTIR, fluorescence spectroscopy, and 13C NMR suggested that samples of sodium humates isolated from soil, compost, and lignite were a more polycondensed, oxidized, unsaturated, humified, and aromatic structure. On the other hand, commercial lignohumate (LH) had very simple structural components and wide molecular heterogeneity. Furthermore, a small molecular size and weight, low degree of aromatic polycondensation, low level of conjugated chromophores and fluorophores, and low humification degree were characteristic for commercial LH. It should be noted that the sample of commercial LH was characterized by 13C NMR analysis with a slightly higher value of aromaticity in comparison with the sample of compost. The application of nondestructive analytical methods such as UV/VIS, FTIR, 13C NMR, and fluorescence spectroscopy help us to provide main characteristics of selected humic substances.

Klíčová slova

13C NMR spectroscopy, Fourier transform infrared spectroscopy (FTIR), humates, lignohumate, steady-state fluorescence spectroscopy, UV-VIS

Autoři

ENEV, V.; POSPÍŠILOVÁ, Ľ.; KLUČÁKOVÁ, M.; LIPTAJ, T.; DOSKOČIL, L.

Rok RIV

2014

Vydáno

27. 1. 2014

Nakladatel

Czech Academy of Agricultural Sciences

Místo

Prague

ISSN

1801-5395

Periodikum

Soil and Water Research

Ročník

Číslo

Stát

Česká republika

Strany od

Strany do

Strany počet

BibTex

@article{BUT105185,
  author="ENEV, V. and POSPÍŠILOVÁ, Ľ. and KLUČÁKOVÁ, M. and LIPTAJ, T. and DOSKOČIL, L.",
  title="Spectral Characterization of Selected Natural Humic Substances",
  journal="Soil and Water Research",
  year="2014",
  volume="9",
  number="1",
  pages="9--17",
  issn="1801-5395"
}